there is an 87 gn for sale that I wanna buy....the dealer says it last ran high 11's it has a bigger turbo bigger injectors and fmic, it also has 88k miles and has a good body and interior, new head gaskets and rods....what it needs is an exhaust and it has a loose bearing in the engine he said it runs....he wants $8500 or he'll take my car plus $3500 cash! Plus he will finaince me with payments! should I take it and how hard is it to fix or replace a loose bearing